#include <bits/stdc++.h>
using namespace std;
int n,poz[1001],rez[1001],t,j,x,m,a[1001];

void date()
{
    freopen("scmax.in","r",stdin);
    freopen("scmax.out","w",stdout);
}
inline int max(int a,int b)
{
    if(a>b) return a;
    else return b;
}
inline void show(int n,int m)
{
    while(poz[n]!=m)n--;
    if( m>1)show(n-1,m-1);
    printf("%d ",a[n]);
}
int main()
{
    date();
    scanf("%d",&n);

    for(int i=1;i<=n;i++)
    {
        scanf("%d",&a[i]);
        x=a[i];
        j=1;
        while(j<=m && x > rez[j]) j++;
        rez[j]=x;
        poz[i]=j;
        m=max(j,m);
    }
    printf("%d\n",m);
    show(n,m);
    return 0;
}